Preparation and application of tetrahydrophthalic anhydride_Kain Industrial Additive

Background and overview[1] Tetrahydrophthalic anhydride is also called tetrahydrophthalic anhydride. Tetrahydrophthalic anhydride has cis and trans isomers, and the trans isomer has two optical isomers, d- and dl-. The cis-isomer precipitates from diethyl ether or petroleum as white flake crystals, and the trans-dl-isomer precipitates from a mixture of benzene and petroleum as white cubic crystals.…